Electric switch.



G. S. VAN NUIS.

ELECTRIC SWITCH.

APPLICATION FILED JULY 26, 1907.

Patented Feb. 7, 1911.

n i I W1 tn asses Attorneys.

CHARLES S. VAN NUIS, OF PHILADELPHIA, PENNSYLVANIA.

ELECTRIC SV/LilllCH.

Specification of Letters Patent.

flatented l eln "5, Itlllltlt.

to make the stationary contact members rcmovable from the base it such is desired.

Other objects consist in improvements in details of constrlwtion, as will more fully appear from the following specification and accompanying drawings.

In the drawings Figure l is a vertical section on the line 1-l of Fig. 52, showing the plates arranged within the base before the mounting is molded Fig. 2 is a vertical section on the line E2-2 of Fig. 1. Fig. is a section on theline 3 -3 of .l ig. 2. .Fig. l is a view similar to Fig. 2 but with the mounting molded in place. l ig. 5 is a detail view similarlo l ig. showing the lixed contact members ot the .iWltljll morably sccured to the base. l ig. l) is a plan view ol' the front escutcheon plate. llig. 7 is a plan view of the dam used in connection with the plate; and Fig. 8 is a vertical section show ing the invention applied to a clilt'erent form of construction.

In all of the views like parts are clesignated by the same reference elu'lracters.

In carrying out my invention l tn'ovide the usual plates l----l, which constitute the fixed contact members ol' the switch which are held within the base 2, which consl itutes the base of the switch by means oi" the mold-.

ary 23, 12107.

conmmted together by a pin a t i re back of the base, such pin being ordinarily fixed and by a pin 9 on the .tronl of the base. This latter pin may be a fixture or may be temporarily substituted in place of a pin or l'n :uhlition the plates are boll, which becomes a liXlul'c ol' the switch. Such bolt shown in Fig. 8 at it), and for the prinniry purpose ol imparting ten sion upon the springs ll, which assist the plates l in (Jultl'tltlllllg with the knife-blade. Such structure is disclosed in my eopcnding application above referred to.

The slot l is made with tapered walls, as is shown in l 'igs. l, i and 25. i. prefer to make it of three round holes bored hrongh the base and connected together, although the slot may be made in other ways. After the holes are bored they are tapered with a suitable tool so that the taper is in the direction from the front to the back oil the base. in addition to the slot I prefer to make one or more note-hes 12 at the back of the base so that the mounting will enter such slots and form lingers .lil, liig. -l, and hold the plates and molded mounting tirmly within'the slot. liy cutting away that portion of the molded mounting which constitutes the lingers, as shown in big o, the plates l.--l. tijigcther with the mounting may be rcnicw'ed from the front of the base.

in order to hold the plates 1-]. and the cscutrheonplates properly within the slot l lirst assemble them with the trout escutcln eon plate surrounding the plates 1 1. The plates 1 lll --l. are then intrmlimcd within the slot l and the back esruteheon plate U ml; in place. A block. H is now introduced )6- tween the pin 9 and the trout 'eseutcheon plate, and a wedge 153 is introduced between the back esculcheon plate and the pin By means ol the wedge ii the parts may be clamped together, thus pressing lhetwo escutchcon plates against the front and the back of the base. The rear esculcheon plate preterahly -extcnds downward a sutlicient distance. to inclose the lowernmst oi the two notches 12, but it is best: not to inclose all of the upper notch 12 so that sullicient space is left to form a gate for introducing the molten metal whlch constitutes the molded After the mounting has set, the

mounting mounting will be firmly held in position by the fingers 13 within the notches 12.

To remove the plates and molded mounting, the fingers 13 are cut away; a drill similar to that which is used for making the notches 12 can be employed for this purpose. The side plates and the molded mounting can now be driven out of the front of the base. To replace the plates with the molded mounting they are returned to position from the front to the back, the

' escutcheon plate 6 is then introduced in place.

and the wedge 15 is driven in between the escutcheon plate and the pin 8. This serves to lock the parts in position so'that the plates are immovably held within the base.

In'order to support the front escutcheon plate the .screws 16 may be employed, which will become embedded within the mounting when the latter is molded. It is desirable in fitting the plates 1--1 to use the es'cutcheon plates with the slots 17 somewhat wider than the thickness of the plates 1-1. This permitssuificient latitude of adjustment of the relative position of the two plates 1-1. To prevent escape of the molten material which constitutes the mounting at the points where the plates 1l pass through the slots 1717, I provide a dam l8. This dam preferably is made of flannel or felt or other fabric and is best made slightly smaller than the .escutcheon plate. It is formed with slits l9, which lie directly behind the slots 17. The dam is pasted or otherwise secured to the back of the escutcheon plate with the slits 19, registering with the slots 17 The escutcheon plate with the dam thereon. can therefore be readily slipped over the ends of the plates 1-1, and the daniwill be ready in position. When the mounting is molded, the fabric at the slits 1919'will effectively prevent the escape of the molten material through the slots.

In someinstances the pressure of the molten material may force the fabric at the sides of the slits through the slots 17-17 against the sides of the plates 1-1.

lVhere the construction shown in Fig. 8 is employed the front cscutcheon plate and dam are modified accordingly. In this figure I have shown springs 11 which bear against the plates 1 and tend to make a more intimate contact between the plates and the knife blade. The ends of the springs 11 are embedded in the molded mounting and are provided with washers which also enter the mounting. Tension is given to the springs by a bolt 10 which passes through the springs and plates, and

the slots 17-17 in the front escutcheon plate 5, and the slots 19-19 in the dam 13- are made widecnough to accommodate the ends of the springs and washers.

In accordance with the provisions of the patent statutes, I have described the principle of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the apparatus shown is merely illustrative and that the invention can'be carried out in other Ways,

Having now described my invention, what I, claim as new and desire to secure by Letters Patent is- 1. A switch in which a stationary contact member is retained within the base by means of a molded mounting, there being additional means to retain the mounting within the base.

2. A switch having a stationary contact secured to the base by means of a mounting molded in the base and secured thereto, the' mounting being mutilatablepmd when mutilated, it is removable from the base, and

means for securing the mounting in the base after mutilation of the mounting.

3. A switch having a stationary contact member secured. within the base by means of a molded mounting, the opening in the base being tapered toward the back so as to permit of the removal of the mounting and of its return to the base, and means for seouring the mounting to the base after its return. 1

4:. A switch having a stationary contact member secured within the base by means of a molded mounting, the opening in the base being tapered, there being means operating on the wedge principle exerting stress in the opposite direction-to the taper.

5. A switch in which a stationary contact member is secured in the base by means of a molded mounting in a slot which tapers toward the back, and means for permitting of the removal of the mounting from the base and a wedge for securing the mounting to the base.

6. A switch in which a stationary contact member is held in place by means of a molded mounting extending through the base, the said mounting having integral fingers engaging the back of the base.

-7. A switch in which a stationary contact member is held in place by means of a mold prevent escape of the molten material conesenpe of the inelren material which e0nstit'utes the mounting. 10 Tins spvelficntnm slg'ned and \vltnessed HHS 25th day 011 July. 1907.

stituting the mounting through the slot.

9. A switch having a stationary contact member secured \vithln the base by means of n molded mounting, there being an esenteh- CHARLES S. VAN NUIS.

eon plate with n hu'ge slot'nnd a fabric \Yitnesses:

(lam secured to the back of the plate and LEONARD .H. DYE,

having; a slit behind the slot, to prevent J0I1NL.L0'rsen. 

